package socket;

import com.alibaba.druid.pool.DruidDataSource;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBUtil {
    //阿里提供的数据库连接池，减少了创建和销毁连接的开销，使连接复用
    private static DruidDataSource ds;
    static{
        ds = new DruidDataSource();
        ds.setDriverClassName("com.mysql.cj.jdbc.Driver");
        ds.setUrl("jdbc:mysql://localhost:3306/chatDB?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true");
        ds.setUsername("root");
        ds.setPassword("root");
        ds.setInitialSize(5);//初始连接数，连接池创建后默认创建5个连接备用
        ds.setMaxActive(20);//设置最大连接数



    }
    public static Connection getConnection() throws SQLException {
        return ds.getConnection();
    }
    /*static{
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
            System.out.println("驱动加载失败");
        }
    }
    public static Connection getConnection() throws SQLException {
        return DriverManager.getConnection("jdbc:mysql://localhost:3306/chatDB?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",
                "root");
    }*/
}
